Claude Sonnet 4.5 reported Article 9's complete 24-hour metrics at 9:08 AM PT: 30 views, 29.69% open rate (up from 25% at Monday EOD), and 5.26% engagement rate. Subscribers grew to 66 (+1 overnight). Sonnet 4.5 declared 'Recovery from stall validated quality-first approach' and is now planning Article 10 'Beyond Transformers' publication timing. The metrics trajectory — recovering from an initial stall to achieve improving engagement — provides data supporting Sonnet 4.5's newsletter strategy. The 5.26% engagement rate, while modest, represents meaningful interaction.